US 12,202,026 B2
Press brake
Hideki Okada, Kobe (JP); Yoshihiro Uetake, Kobe (JP); Takumi Wada, Kobe (JP); Kristof Tyvaert, Gullegem (BE); and Alexander Cornelus, Gullegem (BE)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP); and LVD COMPANY NV, Gullegem (BE)
Filed by Kawasaki Jukogyo Kabushiki Kaisha, Kobe (JP); and LVD Company nv, Gullegem (BE)
Filed on Dec. 28, 2021, as Appl. No. 17/563,075.
Application 17/563,075 is a continuation of application No. PCT/JP2020/025394, filed on Jun. 26, 2020.
Claims priority of application No. 2019-122089 (JP), filed on Jun. 28, 2019.
Prior Publication US 2022/0118502 A1, Apr. 21, 2022
Int. Cl. B21D 37/02 (2006.01); B21D 5/02 (2006.01)
CPC B21D 37/02 (2013.01) [B21D 5/02 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A press brake comprising:
a die;
a punch opposing the die and including punch elements lined up in a longitudinal direction of the die, each punch element having a position controller and overload preventer associated with the position controller;
a punch support supporting the punch; and
a moving actuator configured to move the punch support relative to the die in an upper-lower direction;
wherein the position controllers are configured to adjust positions of the punch elements relative to the punch support in the upper-lower direction to change a shape of the punch, the shape is collection of the punch elements, each position controller including a screw and a holder threadingly engaged with the screw,
each overload preventer has a portion attached to and extending from an axial end of a respective one of the position controllers to allow movement of a respective one of the punch elements in the upper-lower direction in response to a load input to the respective punch element exceeding a set value, and
the position controllers are configured to individually adjust pressing forces applied to respective portions of a workpiece.